/*
 * @description: 
 * @version: 1.0.1
 * @Author: xuqiulin
 * @Date: 2021-06-08 09:42:53
 * @LastEditors: Please set LastEditors
 * @LastEditTime: 2021-07-08 09:56:40
 */

let coverBlock = [22, 33];
let coverBlock1 = JSON.stringify(coverBlock);
let coverBlock2 = JSON.parse(JSON.stringify(coverBlock));

console.log(typeof(coverBlock1[0]));
console.log(typeof(coverBlock2[0]));

let json = {'name1': '1', 'name2': '2'};
console.log(Object.keys(json).length);
